AR10 .243 & Berger 108gr elite hunters

[deer_hunter132]

Has anyone else had issues with the bullet hitting the bottom of the chamber hole with these long bullets?
tried poly and metal mag. it just ended up jamming the tip into the barrel hole face.
it appears the slenderness is causing the tip to touch because the bullet isnt pointing up soon enough from sliding on the barrel lugs.
is it acceptable to radius/chamfer the chamber opening?

 

[deer_hunter132]

tech @ berger suggested the mag lip angle, so i tried that. a little upward angle added to the lips it was all it took!